The closest I've ever gotten to being on a deserted island are summer visits with friends to El Matador State Beach (right outside of Los Angeles). And usually, on the trip home, the overall feeling is a state of relaxation and peacefulness. But sometimes it's nice to channel the deserted island feeling at home--especially when a trip to the beach is out of the question.
Creating outdoor seating underneath a DIY canopy gets my vote anytime! I also love the look of a makeshift tent for lounging and relaxing. And if your space allows, design a place to sleep outdoors with the help of an indoor (or outdoor) patio. Summer evenings are great for enjoying the cooler weather once the sun goes down--channel your own deserted island at home by cozying up the outdoors.
I've also been a big fan of shell decor since the first (of many) family vacations to the beach. Bringing home souvenirs of travels always made the memories last year-round. A giant clam shell can function as a decorative bowl or container for the landing strip. You can also string a handful of shells and create a mobil for your space. The versatility of shells is what I love best--allowing you to change up your decor over time.
To me, nothing is more inspiring than a beach sky (be it stormy or crystal clear). Incorporating these beautiful, blue hues in your home is a great way to surround yourself in a sea of tranquil bliss.
(Images: 1. Flickr member HGruber licensed for use under Creative Commons License 2. Create A DIY Canopy To Make Your Own Outdoor Room, 3. Relax In A DIY Hammock 4. Bill & Beth's Sleeping Porch, 5. Survey: Do You Sleep Outside In The Summer?, 6. Flickr member mrlins licensed for use under Creative Commons License, 7. Look! Clam Shell Dog Bowl, 8. 4 Mulch Ideas for Potted Plants, 9. Summer Collecting: Bring A Little Sand In, 10. Best Souvenirs To Display In The Home, 11. ColorTherapy: The Ocean Room